2605281 has 24 divisors (see below), whose sum is σ = 4158720. Its totient is φ = 1445472.

The previous prime is 2605259. The next prime is 2605289. The reversal of 2605281 is 1825062.

It is not a de Polignac number, because 2605281 - 2⁹ = 2604769 is a prime.

It is a super-2 number, since 2×2605281² = 13574978177922, which contains 22 as substring.

It is a Curzon number.

2605281 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2605289) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5200 + ... + 5678.

It is an arithmetic number, because the mean of its divisors is an integer number (173280).

2^2605281 is an apocalyptic number.

2605281 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2605281 is a deficient number, since it is larger than the sum of its proper divisors (1553439).

2605281 is a wasteful number, since it uses less digits than its factorization.

2605281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 2605281 is about 1614.0882875481. The cubic root of 2605281 is about 137.5999229594.

The spelling of 2605281 in words is "two million, six hundred five thousand, two hundred eighty-one".